Miles between Boulder, CO and Rockford, IL

There are
973 mi
from Boulder, CO to Rockford, IL

That's the driving distance. It would take 17 hours 7 mins to go from Boulder, Colorado to Rockford, Illinois.

The flight distance (direct flight from Boulder, CO to Rockford, IL) is 854.66 mi.

973 mi = 1,565.76 kms